package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Set;

/**
 * @Author: Sabrina
 * @Date:2025/06/05/17:17
 * @Description:
 */
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 分页菜品查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);//新增走完就能得到主键id了

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
            //做完循环再进行新增,Mapper中用foreeach批量添加,减少和数据库的交互次数,提高效率
        }
    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    @Transactional
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 菜品的起售和停售
     * @param status
     * @param id
     */
    @Override
    public void startAndStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查菜品数据
     * @param categotyId
     * @return
     */
    @Override
    public List<Dish> list(Long categotyId) {
        Dish dish = Dish.builder()
                .categoryId(categotyId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表的基本数据
        dishMapper.update(dish);

        //口味先删后增
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //向菜品表插入1条数据
//        dishMapper.insert(dish);//新增走完就能得到主键id了

        //插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
            //做完循环再进行新增,Mapper中用foreeach批量添加,减少和数据库的交互次数,提高效率
        }
    }


    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    @Override
    //怎样才能删?非起售,无套餐
    public void deleteBatch(Long[] ids) {
        //1. 判断当前菜品是否能够删除---是否存在起售中的菜品??
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中,不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //2.判断当前菜品是否能删除---是否被套餐关联了??
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(List.of(ids));
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被关联了,不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //都没问题,就删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }

    }

}
















